package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;
import service.UserService;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;


@Component
public class SpringSecurityUserService implements UserDetailsService {
    @Reference//通过dubbo远程调用用户服务
    private UserService userService;

    //根据用户名查询用户信息
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //远程调用用户服务，根据用户名查询用户信息
        User user = userService.findByUserName(username);
        //先判断用户是否可用
        if (user != null) {
            List<GrantedAuthority> list = new ArrayList<>();
            Set<Role> roles = user.getRoles();
            for (Role role : roles) {
                //给用户授予角色,角色可能一个或多个
                list.add(new SimpleGrantedAuthority(role.getKeyword()));
                Set<Permission> permissions = role.getPermissions();
                //给角色授予权限
                for (Permission permission : permissions) {
                    list.add(new SimpleGrantedAuthority(permission.getKeyword()));
                }
            }
            org.springframework.security.core.userdetails.User securityUser =
                    new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
            return securityUser;
        }
        return null;
    }


}
